The largest-bodied of all the species of Crateromys and an arboreal inhabitant of oak-pine forest where it builds stick-nests in tree crowns for shelter (Oliver et al., 1993; Heaney et al., 1998). In many ways, C. schadenbergi is an ecological and morphological equivalent of large-bodied tropical tree squirrels (Sciuridae), which do not occur in the Greater Luzon Faunal Region.